Measuring device for concrete-mixers.



No. 817,436. .PATENTED APR. 10, 1906.

J. MUIR.

MEASURING DEVICE FOR CONCRETE MIXERS. APPLICATION FILED SEPT. 28. 1905.

ATTORNEIQS onirnn STATES PATENT OFFICE.

JOHN MUIR, OF BRANTFORD, CANADA.

Specification of Letters Patent.

Patented April 10, 1906.

Application filed September 28, 1905. Serial No. 280,484:-

lb all whom, it may concern:

Be it known that 1, JOHN More, of the city of Brantford, in the countyof Brant, Province of Ontario, Canada, have invented certain new anduseful Improvements in Measuring Devices for Concrete-Mixers, of whichthe following is a specification.

This invention relates to measuring-chambers having movable oradjustable radial wings, and has for its object to devise a simpler andmore effective means for hinging and adjusting the radial wings of therotary measuring-chamber to give the proper proportion of cement to theother ingredients of the concrete.

With this object in view my invention consists, essentially, in securingone of the wings to sleeves journaled on the shaft and the other tosleeves journaled on the first-mentioned sleeves, both sleeves extendingout through the ends of the cylinder, where they are provided withindex-arms, clamps being provided whereby the index-arms may be securedto the cylinder ends at various angles the one to the other,substantially as hereinafter more specifically described and thendefinitely claimed.

Figure 1 is a vertical section showing my device in position for use.Fig. 2 is an enlarged end elevation of my device. Fig. 3 is 2%longitudinal section on the same scale as Referring particularly to Fig.1, A is part of the frame of concrete-mixer, on which is supported thehopper B. Below the hopper is journaled a cylindrical chamber C in suchposition as to close the opening of the under side of the hopper. Belowthe cylinder is a spout D, discharging into the end of amixingcylinderE, of ordinary construction, substantially as shown in theprior application hereinbefore referred to. The cylinder C has anopening F in its side, through which the contents of the hopper may flowinto the interior of the cylinder. Within the cylinder are radialpartitions G,- hinged on the shaft H in the manner I will now describe.At each end of the cylinder one of the partitions G is secured to asleeve 1, journaled on the shaft H. The other artition is secured ateach end of the cylin or to a sleeve J, journaled on the sleeve 1. Atone end each of the sleeves I and J extends out through the end K of thecylinder. The sleeve I has an index-arm L secured thereto, and thesleeve J has a similar index-arm M secured to it. One or both of theindex-arms are provided with means whereby the radial partitions may beangularly adjusted relatively to one another. For this purpose I preferto use clamping-screws N, which may be screwed into any one of theseries of holes in the end K. In the drawings twelve of these are shownand numbered; but the exact number and spacing may be varied to producethe same results.

The shaft 11 is preferably keyed or otherwise secured to the cylinder,so that the latter may be rotated, the shaft H being suitably journaledin any convenient part.

It will be seen that by angularly adjusting the radial partitions thecapacity of the sector-shaped chamber between them may be varied, sothat when the cylinder is rotated any desired quantity of cement orother material may be received. from the hopper and deposited in thespout below.

The device will be used in concrete-mixer in which a gravel-receptacleof substantially constant capacity is employed, so that by setting theindex-arms L and M a desired proportion of cement to gravel may beobtained. By adjusting the arm L to the positions numbered 12 to 5similar proportions of cement to gravel may be obtained, the indexarm Mremaining at I. With the indexarm M at zero and the index-arm L at 4 aproportion of one-quarter is obtained. With the index-arm L at 3 and theindexarm M at zero a proportion of one-third is obtained. Then byswinging the index-arm M to 2 a proportion of one-half is obtained.

As the index is clearly exposed at the end of the cylinder, the machinemay be instantly set to the required proportion, which is an importantadvantage, as different proportions are demanded as a work progresses,owing to differences in material used or differences in the productdesired.

What I claim as my invention is In measuring and feeding ap aratus thecombination of a hopper; a ho low rotary cylinder closing the lower endof the hopper and having an opening in its side; a shaft extendingthrough the cylinder two radial par titions hinged on the shaft; twoconcentric ing angles to one another, substantially as sleeves journaledon the shaft secured re- I described. spectively to the radialpartitions and each I Toronto, September 22, 1905.

extending out through end of the cylinder; JOHN NIUIR. 5 an index-armsecured to each sleeve outside In presence of the cylinder; and meansfor clamping the in- IRENE BAXTER, dex-arins to the end of the cylinderat vary- 1 O. S. TAPSOOTT.

